US7186746B2 - Indoles having anti-diabetic activity - Google Patents

Indoles having anti-diabetic activity Download PDF

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US7186746B2
US7186746B2 US10/524,697 US52469705A US7186746B2 US 7186746 B2 US7186746 B2 US 7186746B2 US 52469705 A US52469705 A US 52469705A US 7186746 B2 US7186746 B2 US 7186746B2
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methyl
indol
phenoxy
trifluoromethoxy
acid
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US20050277685A1 (en
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John J. Acton, III
Sheryl D. Debenham
Kun Liu
Peter T. Meinke
Harold B. Wood
Regina M. Black
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Merck Sharp and Dohme LLC
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Definitions

  • the instant invention is concerned with indoles having an aryloxyalkanoic acid substituent, and pharmaceutically acceptable salts and prodrugs thereof, which are useful as therapeutic compounds, particularly in the treatment of Type 2 diabetes mellitus, and of conditions that are often associated with this disease, including obesity and lipid disorders.
  • Diabetes is a disease derived from multiple causative factors and characterized by elevated levels of plasma glucose (hyperglycemia) in the fasting state or after administration of glucose during an oral glucose tolerance test.
  • type 1 diabetes or insulin-dependent diabetes mellitus ODM
  • type 2 diabetes or noninsulin-dependent diabetes mellitus (NIDDM)
  • insulin is still produced in the body.
  • Type 2 diabetes often have hyperinsulinemia (elevated plasma insulin levels); however, these patients are insulin resistant, which means that they have a resistance to the effect of insulin in stimulating glucose and lipid metabolism in the main insulin-sensitive tissues, which are muscle, liver and adipose tissues.
  • Patients who are insulin resistant but not diabetic compensate for the insulin resistance by secreting more insulin, so that serum glucose levels are not elevated enough to meet the criteria of Type 2 diabetes.
  • patients with Type 2 diabetes even elevated plasma insulin levels are insufficient to overcome the pronounced insulin resistance.
  • Persistent or uncontrolled hyperglycemia that occurs with diabetes is associated with increased and premature morbidity and mortality. Often abnormal glucose homeostasis is associated both directly and indirectly with obesity, hypertension, and alterations of the lipid, lipoprotein and apolipoprotein metabolism, as well as other metabolic and hemodynamic disease. Patients with type 2 diabetes mellitus have a significantly increased risk of macrovascular and microvascular complications, including atherosclerosis, coronary heart disease, stroke, peripheral vascular disease, hypertension, nephropathy, neuropathy, and retinopathy. Therefore, therapeutic control of glucose homeostasis, lipid metabolism, obesity, and hypertension are critically important in the clinical management and treatment of diabetes mellitus.
  • syndrome X A patient having this syndrome is characterized as having three or more symptoms selected from the following group of five symptoms: (1) abdominal obesity; (2) hypertriglyceridemia; (3) low high-density lipoprotein cholesterol (HDL); (4) high blood pressure; and (5) elevated fasting glucose, which may be in the range characteristic of Type 2 diabetes if the patient is also diabetic.
  • Each of these symptoms is defined in the recently released Third Report of the National Cholesterol Education Program Expert Panel on Detection, Evaluation and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III, or ATP III), National Institutes of Health, 2001, NIH Publication No. 01-3670.
  • Patients with metabolic syndrome whether or not they have or develop overt diabetes mellitus, have an increased risk of developing the macrovascular and microvascular complications that are listed above that occur with type 2 diabetes, such as atherosclerosis and coronary heart disease.
  • Insulin resistance is not primarily caused by a diminished number of insulin receptors but by a post-insulin receptor binding defect that is not yet completely understood. This lack of responsiveness to insulin results in insufficient insulin-mediated activation of uptake, oxidation and storage of glucose in muscle and inadequate insulin-mediated repression of lipolysis in adipose tissue and of glucose production and secretion in the liver.
  • a widely used drug treatment involves the administration of meglitinide or a sulfonylurea (e.g. tolbutamide or glipizide), which are insulin secretagogues. These drugs increase the plasma level of insulin by stimulating the pancreatic ⁇ -cells to secrete more insulin.
  • meglitinide or a sulfonylurea e.g. tolbutamide or glipizide
  • the amount of insulin in the body can be supplemented by the injection of insulin so that insulin concentrations are high enough to stimulate even the very insulin-resistant tissues.
  • dangerously low levels of plasma glucose can result from administration of insulin and/or insulin secretagogues, and an increased level of insulin resistance due to the even higher plasma insulin levels can occur.
  • the biguanides are another class of drugs that are widely used to treat type 2 diabetes.
  • the two best known biguanides, phenformin and metformin cause some correction of hyperglycemia without risk of causing hypoglycemia.
  • the biguanides can be used either with insulin or with an insulin secretagogue without increasing the risk of hypoglycemia.
  • phenformin and metformin can induce lactic acidosis and nausea/diarrhea.
  • Metformin has a lower risk of side effects than phenformin and is widely prescribed for the treatment of Type 2 diabetes.
  • the glitazones are a newer class of compounds that can ameliorate hyperglycemia and other symptoms of type 2 diabetes. These agents substantially increase insulin sensitivity in muscle, liver and adipose tissue in several animal models of type 2 diabetes, resulting in partial or complete correction of elevated plasma glucose levels without the occurrence of hypoglycemia.
  • the glitazones that are currently marketed are agonists of the peroxisome proliferator activated receptor (PPAR) gamma subtype.
  • PPAR-gamma agonism is generally believed to be responsible for the improved insulin sensititization that is observed with the glitazones.
  • New PPAR agonists are being developed for the treatment of Type 2 diabetes and/or dyslipidemia. Many of the newer PPAR compounds are agonists of one or more of the PPAR alpha, gamma and delta subtypes. Compounds that are agonists of both the PPAR alpha and PPAR gamma subtypes (PPAR alpha/gamma dual agonists) are promising because they reduce hyperglycemia and also improve lipid metabolism.
  • PPAR agonists and particularly glitazones, have had shortcomings which have so far detracted from their attractiveness. Some of the compounds, and especially troglitazone, have exhibited liver toxicity. Troglitazone was eventually withdrawn from the marketplace because of hepatotoxicity. Another weakness in the currently marketed PPAR agonists is that monotherapy for type 2 diabetes produces only modest efficacy—a reduction in average plasma glucose of ⁇ 20% and a decline from ⁇ 9.0% to ⁇ 8.0% in HemoglobinA1C. The current compounds also do not greatly improve lipid metabolism, and may actually have a negative effect on the lipid profile. These shortcomings have provided an incentive to develop better insulin sensitizers for Type 2 diabetes which function via similar mechanism(s) of action.
  • WO01/30343 describes a specific compound that is a PPAR partial agonist/antagonist that is useful for the treatment of obesity and Type 2 diabetes.
  • WO02/08188 discloses a class of PPAR agonists and partial agonists that are indole derivatives and that are useful in the treatment of Type 2 diabetes, with reduced side effects relating to body and heart weight gain
  • the class of compounds described herein is a new class of PPAR agonists that do not contain a 1,3-thiazolidinedione moiety.
  • the class of compounds includes many compounds that are PPAR ⁇ partial agonists, but also may include PPAR ⁇ full agonists and/or PPAR ⁇ antagonists. Some compounds may also have PPAR ⁇ activity in addition to PPAR ⁇ activity. Some compounds may be mixed full or partial PPAR ⁇ / ⁇ agonists. These compounds are useful in the treatment and control of diabetes, hyperglycemia, and insulin resistance.
  • the compounds may also be useful in the treatment of one or more lipid disorders, including mixed or diabetic dyslipidemia, isolated hypercholesterolemia, which may be manifested by elevations in LDL-C and/or non-HDL-C, hyperapoBliproteinemia, hypertriglyceridemia, an increase in triglyceride-rich-lipoproteins, and low HDL cholesterol concentrations. They may also be useful in the treatment or amelioration of atherosclerosis, obesity, vascular restenosis, inflammatory conditions, psoriasis, polycystic ovary syndrome, and other PPAR mediated diseases, disorders and conditions.
  • lipid disorders including mixed or diabetic dyslipidemia, isolated hypercholesterolemia, which may be manifested by elevations in LDL-C and/or non-HDL-C, hyperapoBliproteinemia, hypertriglyceridemia, an increase in triglyceride-rich-lipoproteins, and low HDL cholesterol concentrations.
  • lipid disorders including mixed or diabetic
  • the present invention is directed to compounds of formula I:
  • alkyl groups may be either linear or branched, unless otherwise specified.
  • the present compounds are effective in lowering glucose, lipids, and insulin in diabetic patients and in non-diabetic patients that have impaired glucose tolerance and/or are in a pre-diabetic condition.
  • the compounds are expected to be efficacious in the treatment of non-insulin dependent diabetes mellitus (NIDDM) in human and other mammalian patients, particularly in the treatment of hyperglycemia and in the treatment of conditions associated with NIDDM, including hyperlipidemia, dyslipidemia, obesity, hypercholesterolemia, hypertriglyceridemia, atherosclerosis, vascular restenosis, inflammatory conditions, and other PPAR mediated diseases, disorders and conditions.
  • NIDDM non-insulin dependent diabetes mellitus
  • the invention has numerous embodiments. It provides compounds of formula I, including pharmaceutically acceptable salts of these compounds, prodrugs of these compounds, and pharmaceutical compositions comprising these compounds and a pharmaceutically acceptable carrier.
  • R 3 is selected from the group consisting of 3-benzisoxazolyl, —O-Phenyl, and —C( ⁇ O)Phenyl, wherein R 3 is optionally substituted with 1–3 substituents independently selected from halogen, —OC 1 –C 3 alkyl, and C 1-3 alkyl, wherein said —OC 1 –C 3 alkyl and C 1 –C 3 alkyl are optionally substituted with 1–5 halogens.
  • R 1 is —X-Phenyl-Y—Z, where Phenyl is unsubstituted or substituted with 1–3 groups independently selected from A.
  • a subset of compounds of Formula I includes compounds in which X is a bond.
  • a subset of compounds of Formula I includes compounds in which X is CH 2 .
  • Y is —OCR 7 R 8 —
  • R 7 is selected from the group consisting of H and C 1 –C 3 alkyl
  • R 8 is C 1 –C 3 alkyl, where R 7 and R 8 are optionally substituted with 1–3 halogens.
  • Y is —OCR 7 R 8 —, R 7 is selected from H and C 1 –C 3 alkyl, and R 8 is C 1 –C 3 alkyl.
  • Y is —CH 2 CHR 6 —, where R 6 is selected from C 1-3 alkyl and —OC 1-3 alkyl, which are optionally substituted with 1–3 halogens.
  • Y is —CH 2 CHR 6 —, where R 6 is —OC 1-3 alkyl, which is optionally substituted with 1–3 halogens.
  • A is selected from the group consisting of C 1 –C 3 alkyl, CF 3 , —OCH 3 , —OCF 3 , and halogen.
  • a preferred subset of compounds includes compounds in which R 2 is C 1-3 alkyl or CF 3 .
  • R 3 is —C( ⁇ O)Phenyl, where R 3 is optionally substituted with 1–3 substituents independently selected from —OCH 3 , —OCF 3 , and halogen.
  • R 3 is 3-benzisoxazolyl or aryl, which is optionally substituted with 1–3 substituents independently selected from halogen, OCH 3 , OCF 3 , CH 3 , and CF 3 .
  • R 3 is 3-benzisoxazolyl, aryl, —OPhenyl, or —SPhenyl, where R 3 is optionally substituted with 1 substituent selected from halogen, OCH 3 , OCF 3 , and CF 3 .
  • R 1 is —X-Pyridinyl-YZ.
  • a subset of compounds includes compounds in which p is 1.
  • Preferred compounds generally have a group Z which is —CO 2 H.
  • R 1 is generally
  • Y is —OCR 7 R 8 —
  • R 7 is H
  • R 8 is C 1-3 alkyl, which is optionally substituted with 1–3 halogens.
  • Y is —CH 2 CR 5 R 6 —
  • R 5 is H
  • R 6 is C 1-3 alkyl or —OC 1-3 alkyl, where C 1-3 alkyl and —OC 1-3 alkyl are optionally substituted with 1–3 halogen atoms.
  • the X and —YZ substitutents on the phenyl group above are meta or para to one another, and in more preferred compounds, X and —YZ are meta with respect to one another, as shown below as Formula IA.
  • Compounds having Formula IA as shown below, and pharmaceutically acceptable salts thereof, have especially useful properties in treating insulin resistance, type 2 diabetes, and dyslipidemia that is associated with type 2 diabetes and insulin resistance:
  • X is a bond or CH 2 ;
  • C* asterisk
  • both the R and S stereochemical configurations at the carbon C* are active, though they have somewhat different activities in terms of the amount of PPAR ⁇ and PPAR ⁇ activity.
  • Preferred sets of compounds of Formula IA in which X is a bond have the following substituents:
  • X is CH 2 ;
  • R 3 is —C( ⁇ O)Phenyl, which is optionally substituted with 1–2 groups independently selected from the group consisting of Cl, CH 3 , CF 3 , —OCH 3 , and —OCF 3 .
  • p is 1.
  • Tables 1–4 Structures of specific compounds are disclosed in Tables 1–4. The names are provided for the compounds in separate Tables 1A–4A. Each compound is given the same number in the two sets of tables. Each compound is a specific embodiment of the current invention. The syntheses of some of these compounds are also provided in the Examples.
  • the compounds of this invention can be used in pharmaceutical compositions comprising the compound or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier.
  • the compounds of this invention can also be used in pharmaceutical compositions in which a compound of Formula I or a pharmaceutically acceptable salt thereof is the only active ingredient.
  • the compounds of the invention and pharmaceutically acceptable salts thereof can be used in the manufacture of medicaments for the treatment of type 2 diabetes mellitus in a human or other mammalian patient.
  • the compounds as defined above may be used in the following methods to treat diseases, as well as other diseases not listed below:
  • a method for treating non-insulin dependent diabetes mellitus (type 2 diabetes) in a human or other mammalian patient in need of such treatment which comprises administering to the patient a therapeutically effective amount of a compound of Formula I;
  • a method for treating or controlling hypercholesterolemia in a human or other mammalian patient in need of such treatment which comprises administering to the patient a therapeutically effective amount of a compound of Formula I;
  • (6) a method for treating or controlling hypertriglyceridemia in a human or other mammalian patient in need of such treatment which comprises administering to the patient a therapeutically effective amount of a compound of Formula I;
  • lipid disorders including mixed or diabetic dyslipidemia, low HDL cholesterol, high LDL cholesterol, hyperlipidemia, hypercholesterolemia, and hypertriglyceridemia in a human or other mammalian patient in need of such treatment which comprises administering to the patient a therapeutically effective amount of a compound of Formula I;
  • (9) a method for treating atherosclerosis, for reducing the risk of developing atherosclerosis, for delaying the onset of atherosclerosis, and/or reducing the risk of sequelae of atherosclerosis in a human or other mammalian patient in need of such treatment or at risk of developing atherosclerosis or sequelae of atherosclerosis, which comprises administering to the patient a therapeutically effective amount of a compound of Formula I.
  • Sequelae of atherosclerosis include for example angina, claudication, heart attack, stroke, etc.
  • the compounds are especially useful in the treatment of the following diseases, by administering a therapeutically effective amount to a patient in need of treatment:
  • Alkyl means saturated carbon chains which may be linear or branched or combinations thereof, unless the carbon chain is defined otherwise.
  • alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, sec- and tert-butyl, pentyl, hexyl, heptyl, octyl, nonyl, and the like.
  • Alkenyl means carbon chains which contain at least one carbon-carbon double bond, and which may be linear or branched or combinations thereof. Examples of alkenyl include vinyl, allyl, isopropenyl, pentenyl, hexenyl, heptenyl, 1-propenyl, 2-butenyl, 2-methyl-2-butenyl, and the like.
  • Alkynyl means carbon chains which contain at least one carbon-carbon triple bond, and which may be linear or branched or combinations thereof. Examples of alkynyl include ethynyl, propargyl, 3-methyl-1-pentynyl, 2-heptynyl and the like.
  • Cycloalkyl means mono- or bicyclic saturated carbocyclic rings, each having from 3 to 10 carbon atoms, unless otherwise stated. The term also includes a monocyclic ring fused to an aryl group. Examples of cycloalkyl include cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, and the like.
  • a cycloalkylidene group is a divalent cycloalkane radical in which both attachments are at the same carbon.
  • the cyclopropyl group of 1,1-dimethylcyclopropane is a cyclopropylidene group.
  • Aryl when used to describe a substituent or group in a structure means a monocyclic, bicyclic or tricyclic compound in which all the rings are aromatic and which contains only carbon ring atoms.
  • the term “aryl” can also refer to an aryl group that is fused to a cycloalkyl or heterocycle.
  • Heterocyclyl “heterocycle,” and “heterocyclic” means a fully or partially saturated monocyclic, bicyclic or tricyclic ring system containing at least one heteroatom selected from N, S and O, each of said rings having from 3 to 10 atoms. Examples of aryl substitiuents include phenyl and naphthyl.
  • Aryl rings fused to cycloalkyls are found in indanyl, indenyl, and tetrahydronaphthyl.
  • Examples of aryl fused to heterocyclic groups are found in 2,3-dihydrobenzofuranyl, benzopyranyl, 1,4-benzodioxanyl, and the like.
  • Examples of heterocycles include tetrahydrofuran, piperazine, and morpholine.
  • Preferred aryl groups are phenyl or naphthyl. Phenyl is generally the most preferred.
  • Heteroaryl (and heteroarylene) means a mono-, bi- or tricyclic aromatic ring containing at least one ring heteroatom selected from N, O and S (including SO and SO 2 ), with each ring containing 5 to 6 atoms.
  • heteroaryl examples include pyrrolyl, isoxazolyl, isothiazolyl, pyrazolyl, pyridyl, oxazolyl, oxadiazolyl, thiadiazolyl, thiazolyl, imidazolyl, triazolyl, tetrazolyl, furanyl, triazinyl, thienyl, pyrimidyl, pyridazinyl, pyrazinyl, benzisoxazolyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, benzofuranyl, benzothiophenyl (including S-oxide and dioxide), furo(2,3-b)pyridyl, quinolyl, indolyl, isoquinolyl, dibenzofuran and the like.
  • Halogen includes fluorine, chlorine, bromine and iodine.
  • composition as in pharmaceutical composition, is intended to encompass a product comprising the active ingredient(s), and the inert ingredient(s) that make up the carrier, as well as any product which results, directly or indirectly, from combination, complexation or aggregation of any two or more of the ingredients, or from dissociation of one or more of the ingredients, or from other types of reactions or interactions of one or more of the ingredients.
  • pharmaceutical compositions of the present invention encompass any composition made by admixing a compound of the present invention and a pharmaceutically acceptable carrier.
  • tetrazole means a 2H-tetrazol-5-yl substituent group and tautomers thereof.
  • Compounds of Formula I may contain one or more asymmetric centers and can thus occur as racemates, racemic mixtures, single enantiomers, diastereomeric mixtures and individual diastereomers.
  • the present invention is meant to comprehend all such isomeric forms of the compounds of Formula I.
  • Some of the compounds described herein may contain olefinic double bonds, and unless specified otherwise, are meant to include both E and Z geometric isomers.
  • keto-enol tautomers Some of the compounds described herein may exist with different points of attachment of hydrogen, referred to as tautomers.
  • An example is a ketone and its enol form, known as keto-enol tautomers.
  • keto-enol tautomers The individual tautomers as well as mixtures thereof are encompassed with compounds of Formula I.
  • enantiomers and other compounds with chiral centers may be synthesized by stereospecific synthesis using optically pure starting materials and/or reagents of known configuration.
  • salts refers to salts prepared from pharmaceutically acceptable non-toxic bases or acids including inorganic or organic bases and inorganic or organic acids.
  • Salts derived from inorganic bases include aluminum, ammonium, calcium, copper, ferric, ferrous, lithium, magnesium, manganic salts, manganous, potassium, sodium, zinc, and the like. Particularly preferred are the ammonium, calcium, magnesium, potassium, and sodium salts. Salts in the solid form may exist in more than one crystal structure, and may also be in the form of hydrates.
  • Salts derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines, and basic ion exchange resins, such as arginine, betaine, caffeine, choline, N,N′-dibenzylethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylenediamine, N-ethyl-morpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, hydrabamine, isopropylamine, lysine, methylglucamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purines, theobromine, triethylamine, trimethylamine, tripropylamine, tromethamine, and the like.
  • basic ion exchange resins such as
  • salts may be prepared from pharmaceutically acceptable non-toxic acids, including inorganic and organic acids.
  • acids include acetic, benzenesulfonic, benzoic, camphorsulfonic, citric, ethanesulfonic, fumaric, gluconic, glutamic, hydrobromic, hydrochloric, isethionic, lactic, maleic, malic, mandelic, methanesulfonic, mucic, nitric, pamoic, pantothenic, phosphoric, succinic, sulfuric, tartaric, p-toluenesulfonic acid, and the like.
  • Particularly preferred are citric, hydrobromic, hydrochloric, maleic, phosphoric, sulfuric, and tartaric acids.
  • Prodrugs which are compounds that are converted to the claimed compounds as they are being administered to a patient or after they have been administered to a patient, are also compounds of this invention.
  • a non-limiting example of a prodrug of the carboxylic acids of this invention would be an ester of the carboxylic acid group, for example a C 1 to C 6 ester, which may be linear or branched, which metabolizes to a carboxylic acid of this invention.
  • An ester which has functionality that makes it more easily hydrolyzed after administration to a patient may also be a prodrug.
  • Prodrugs of the class of compounds of this invention may be described as compounds having the Formula I, wherein Z is a group that is easily metabolized under physiological conditions during or after administration to a mammalian or human patient to yield a compound where Z is a carboxylic acid group, or a salt thereof (in solution).
  • Examples of prodrugs of Formula I include compounds in which Z is —CO 2 R a , where the OR a group can be —OR b , —OCH 2 OR b , —OCH(CH 3 )OR b , —OCH 2 OC(O)R b , —OCH(CH 3 )OC(O)R b , —OCH 2 OC(O)OR b , and —OCH(CH 3 )OC(O)OR b , where OR b is selected from C 1-6 alkyl optionally substituted with one or two groups selected from —CO 2 H, —CONH 2 , —NH 2 , —OH, —OAc, NHAc, and phenyl.
  • Compounds of the present invention are potent ligands having agonist, partial agonist or antagonist activity on one or more of the various peroxisome proliferator activated receptor subtypes, particularly PPAR ⁇ .
  • the compounds may also be ligands or agonists, partial agonists or antagonists of the PPAR ⁇ subtype as well as the PPAR ⁇ subtype, resulting in mixed PPAR ⁇ / ⁇ agonism or in agonism of mainly the PPAR ⁇ subtype.
  • Some compounds may also be PPAR ⁇ ligands and have PPAR ⁇ activity in addition to their other PPAR activity.
  • the compounds of this invention are useful in treating or controlling diseases, disorders or conditions which are mediated by one or more ligands of the individual PPAR subtypes (eg. ⁇ or ⁇ ) or a combination of PPAR subtypes (e.g. ⁇ / ⁇ ).
  • One aspect of the present invention provides a method for the treatment and control of diseases that can be mediated by administration of a PPAR agonist or partial agonist, such as type 2 diabetes.
  • One aspect of the present invention provides a method for the treatment and control of such diseases, disorders, or conditions in a mammal which comprises administering to such mammal a therapeutically effective amount of a compound of Formula I.
  • Compounds of the present invention may be useful in treating or controlling many PPAR mediated diseases and conditions, including, but not limited to, (1) diabetes mellitus, and especially non-insulin dependent diabetes mellitus (NIDDM), (2) hyperglycemia, (3) low glucose tolerance, (4) insulin resistance, (5) obesity, (6) lipid disorders, (7) dyslipidemia, (8) hyperlipidemia, (9) hypertriglyceridemia, (10) hypercholesterolemia, (11) low HDL levels, (12) high LDL levels, (13) atherosclerosis and its sequelae, (14) vascular restenosis, (15) irritable bowel syndrome, (16) inflammatory bowel disease, including Crohn's disease and ulcerative colitis, (17) other inflammatory conditions, (18) pancreatitis, (19) abdominal obesity, (20) neurodegenerative disease, (21) retinopathy, (22) psoriasis, (23) metabolic syndrome, (24) ovarian hyperandrogenism (polycystic ovarian syndrome), and other disorders where insulin resistance is
  • They may also have utility in treating high blood pressure, neoplastic conditions, adipose cell tumors, adipose cell carcinomas, such as liposarcoma, prostate cancer and other cancers, including gastric, breast, bladder and colon cancers, angiogenesis, and Alzheimer's disease.
  • the compounds may also have utility in treating osteoporosis.
  • the compounds of this invention may treat osteoporosis or reduce the risk of developing osteoporosis by slowing or stopping the loss of bone density in a patient who has osteoporosis or is at risk of developing osteoporosis.
  • the compounds of this invention may also reverse the loss of bone mass in patients who have already begun to lose bone mass.
  • One aspect of the invention provides a method for the treatment and control of mixed or diabetic dyslipidemia, hypercholesterolemia, atherosclerosis, low HDL levels, high LDL levels, hyperlipidemia, and/or hypertriglyceridemia, which comprises administering to a patient in need of such treatment a therapeutically effective amount of a compound having formula L.
  • the compound may be used alone or advantageously may be administered with a cholesterol biosynthesis inhibitor, particularly an HMG-CoA reductase inhibitor such as lovastatin, simvastatin, rosuvastatin, pravastatin, fluvastatin, atorvastatin, rivastatin, itavastatin, or ZD-4522.
  • the compound may also be used advantageously in combination with other lipid lowering drugs such as cholesterol absorption inhibitors (for example stanol esters, sterol glycosides such as tiqueside, and azetidinones such as ezetimibe), ACAT inhibitors (such as avasimibe), CETP inhibitors, niacin, bile acid sequestrants, microsomal triglyceride transport inhibitors, and bile acid reuptake inhibitors.
  • cholesterol absorption inhibitors for example stanol esters, sterol glycosides such as tiqueside, and azetidinones such as ezetimibe
  • ACAT inhibitors such as avasimibe
  • CETP inhibitors such as avasimibe
  • niacin bile acid sequestrants
  • microsomal triglyceride transport inhibitors microsomal triglyceride transport inhibitors
  • bile acid reuptake inhibitors bile acid reuptake inhibitors
  • Another aspect of the invention provides a method of treating inflammatory conditions, including inflammatory bowel disease, Crohn's disease, and ulcerative colitis by administering an effective amount of a compound of this invention to a patient in need of treatment.
  • Additional inflammatory diseases that may be treated with the instant invention include gout, rheumatoid arthritis, osteoarthritis, multiple sclerosis, asthma, ARDS, psoriasis, vasculitis, ischemia/reperfusion injury, frostbite, and related diseases.
  • Any suitable route of administration may be employed for providing a mammal, especially a human, with an effective dose of a compound of the present invention.
  • oral, rectal, topical, parenteral, ocular, pulmonary, nasal, and the like may be employed.
  • Dosage forms include tablets, troches, dispersions, suspensions, solutions, capsules, creams, ointments, aerosols, and the like.
  • compounds of Formula I are administered orally.
  • the effective dosage of active ingredient employed may vary depending on the particular compound employed, the mode of administration, the condition being treated and the severity of the condition being treated. Such dosage may be ascertained readily by a person skilled in the art.
  • the compounds of the present invention are administered at a daily dosage of from about 0.1 milligram to about 100 milligram per kilogram of animal body weight, preferably given as a single daily dose or in divided doses two to six times a day, or in sustained release form.
  • the total daily dosage is from about 1.0 milligrams to about 1000 milligrams, preferably from about 1 milligrams to about 50 milligrams.
  • the total daily dose will generally be from about 1 milligram to about 350 milligrams.
  • the dosage for an adult human may be as low as 0.1 mg.
  • the dosage regimen may be adjusted within this range or even outside of this range to provide the optimal therapeutic response.
  • Oral administration will usually be carried out using tablets.
  • Examples of doses in tablets are 0.5 mg, 1 mg, 2 mg, 5 mg, 10 mg, 25 mg, 50 mg, 100 mg, and 250 mg.
  • Other oral forms can also have the same dosages (e.g. capsules).
  • compositions which comprise a compound of Formula I and a pharmaceutically acceptable carrier.
  • the pharmaceutical compositions of the present invention comprise a compound of Formula I or a pharmaceutically acceptable salt as an active ingredient, as well as a pharmaceutically acceptable carrier and optionally other therapeutic ingredients.
  • pharmaceutically acceptable salts refers to salts prepared from pharmaceutically acceptable non-toxic bases or acids including inorganic bases or acids and organic bases or acids.
  • a pharmaceutical composition may also comprise a prodrug, or a pharmaceutically acceptable salt thereof, if a prodrug is administered.
  • the compounds of Formula I can be combined as the active ingredient in intimate admixture with a pharmaceutical carrier according to conventional pharmaceutical compounding techniques.
  • the carrier may take a wide variety of forms depending on the form of preparation desired for administration, e.g., oral or parenteral (including intravenous).
  • any of the usual pharmaceutical media may be employed, such as, for example, water, glycols, oils, alcohols, flavoring agents, preservatives, coloring agents and the like in the case of oral liquid preparations, such as, for example, suspensions, elixirs and solutions; or carriers such as starches, sugars, microcrystalline cellulose, diluents, granulating agents, lubricants, binders, disintegrating agents and the like in the case of oral solid preparations such as, for example, powders, hard and soft capsules and tablets, with the solid oral preparations being preferred over the liquid preparations.
  • oral liquid preparations such as, for example, suspensions, elixirs and solutions
  • carriers such as starches, sugars, microcrystalline cellulose, diluents, granulating agents, lubricants, binders, disintegrating agents and the like in the case of oral solid preparations such as, for example, powders, hard and soft capsules and tablets, with the solid oral preparations being preferred over the liquid preparation
  • tablets and capsules represent the most advantageous oral dosage unit form in which case solid pharmaceutical carriers are obviously employed. If desired, tablets may be coated by standard aqueous or nonaqueous techniques. Such compositions and preparations should contain at least 0.1 percent of active compound. The percentage of active compound in these compositions may, of course, be varied and may conveniently be between about 2 percent to about 60 percent of the weight of the unit. The amount of active compound in such therapeutically useful compositions is such that an effective dosage will be obtained.
  • the active compounds can also be administered intranasally as, for example, liquid drops or spray.
  • the tablets, pills, capsules, and the like may also contain a binder such as gum tragacanth, acacia, corn starch or gelatin; excipients such as dicalcium phosphate; a disintegrating agent such as corn starch, potato starch, alginic acid; a lubricant such as magnesium stearate; and a sweetening agent such as sucrose, lactose or saccharin.
  • a dosage unit form is a capsule, it may contain, in addition to materials of the above type, a liquid carrier such as a fatty oil.
  • tablets may be coated with shellac, sugar or both.
  • a syrup or elixir may contain, in addition to the active ingredient, sucrose as a sweetening agent, methyl and propylparabens as preservatives, a dye and a flavoring such as cherry or orange flavor.
  • Compounds of formula I may also be administered parenterally. Solutions or suspensions of these active compounds can be prepared in water suitably mixed with a surfactant such as hydroxypropylcellulose. Dispersions can also be prepared in glycerol, liquid polyethylene glycols and mixtures thereof in oils. Under ordinary conditions of storage and use, these preparations contain a preservative to prevent the growth of microorganisms.
  • the pharmaceutical forms suitable for injectable use include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersions.
  • the form must be sterile and must be fluid to the extent that easy syringability exists. It must be stable under the conditions of manufacture and storage and must be preserved against the contaminating action of microorganisms such as bacteria and fungi.
  • the carrier can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (e.g. glycerol, propylene glycol and liquid polyethylene glycol), suitable mixtures thereof, and vegetable oils.
  • Compounds of Formula I may be used in combination with other drugs that may also be useful in the treatment or amelioration of the diseases or conditions for which compounds of Formula I are useful. Such other drugs may be administered, by a route and in an amount commonly used therefor, contemporaneously or sequentially with a compound of Formula I.
  • a pharmaceutical composition in unit dosage form containing such other drugs and the compound of Formula I is preferred.
  • the combination therapy also includes therapies in which the compound of Formula I and one or more other drugs are administered on different overlapping schedules.
  • the pharmaceutical compositions of the present invention include those that contain one or more other active ingredients, in addition to a compound of Formula I.
  • Examples of other active ingredients that may be administered in combination with a compound of Formula I, and either administered separately or in the same pharmaceutical composition include, but are not limited to:
  • the above combinations include combinations of a compound of the present invention not only with one other active compound, but also with two or more other active compounds.
  • Non-limiting examples include combinations of compounds having Formula I with two or more active compounds selected from biguanides, sulfonylureas, HMG-CoA reductase inhibitors, other PPAR agonists, PTP-1B inhibitors, DP-IV inhibitors, and anti-obesity compounds.
  • Human PPAR ⁇ 2 Human PPAR ⁇ and human PPAR ⁇ were expressed as gst-fusion proteins in E. coli .
  • the full length human cDNA for PPAR ⁇ 2 was subcloned into the pGEX-2T expression vector (Pharmacia).
  • the full length human cDNAs for PPAR ⁇ and PPAR ⁇ were subcloned into the pGEX-KT expression vector (Pharmacia). E. coli containing the respective plasmids were propagated, induced, and harvested by centrifugation.
  • the resuspended pellet was broken in a French press and debris was removed by centrifugation at 12,000 ⁇ g.
  • Recombinant human PPAR receptors were purified by affinity chromatography on glutathione sepharose. After application to the column, and one wash, receptor was eluted with glutathione. Glycerol (10%) was added to stabilize the receptor and aliquots were stored at ⁇ 80° C.
  • TEGM Tris, pH 7.2, 1 mM EDTA, 10% glycerol, 7 ⁇ L/100 mL ⁇ -mercaptoethanol, 10 mM Na molybdate, 1 mM dithiothreitol, 5 ⁇ g/mL aprotinin, 2 ⁇ g/mL leupeptin, 2 ⁇ g/mL benzamidine and 0.5 mM PMSF) containing 0.1% non-fat dry milk and 10 nM [ 3 H 2 ] AD5075, (21 Ci/mmole), ⁇ test compound as described in Berger et al (Novel peroxisome proliferator-activated receptor (PPAR ⁇ ) and PPAR ⁇ ligands produce distinct biological effects.
  • TEGM 10 mM Tris, pH 7.2, 1 mM EDTA, 10% glycerol, 7 ⁇ L/100 mL ⁇ -mercaptoethanol, 10 mM Na molybdate, 1 mM dithio
  • TEGM Tris, pH 7.2, 1 mM EDTA, 10% glycerol, 7 ⁇ L/100 mL ⁇ -mercaptoethanol, 10 mM Na molybdate, 1 mM dithiothreitol, 5 ⁇ g/mL aprotinin, 2 ⁇ g/mL leupeptin, 2 ⁇ g/mL benzamide and 0.5 mM PMSF) containing 0.1% non-fat dry milk and 2.5 nM [ 3 H 2 ]L-783483, (17 Ci/mmole), ⁇ test compound as described in Berger et al (Novel peroxisome proliferator-activated receptory (PPAR ⁇ ) and PPAR ⁇ ligands produce distinct biological effects.1999 J Biol Chem 274: 6718–6725).
  • L-783483 is 3-chloro-4-(3-(7-propyl-3-trifluoromethyl-6-benz-[4,5]-isoxazoloxy)propylthio)phenylacetic acid, Ex. 20 in WO 97/28137).
  • Assays were incubated for ⁇ 16 hr at 4° C. in a final volume of 150 ⁇ L. Unbound ligand was removed by incubation with 100 ⁇ L dextran/gelatin-coated charcoal, on ice, for ⁇ 10 min. After centrifugation at 3000 rpm for 10 min at 4° C., 50 ⁇ L of the supernatant fraction was counted in a Topcount.
  • TEGM Tris, pH 7.2, 1 mM EDTA, 10% glycerol, 7 ⁇ L/10 mL ⁇ -mercaptoethanol, 10 mM Na molybdate, 1 mM dithiothreitol, 5 ⁇ g/1 mL aprotinin, 2 ⁇ g/mL leupeptin, 2 ⁇ g/mL benzamide and 0.5 mM PMSF) containing 0.1% non-fat dry milk and 5.0 nM [ 3 H 2 ]L-797773, (34 Ci/mmole), ⁇ test compound.
  • TEGM 10 mM Tris, pH 7.2, 1 mM EDTA, 10% glycerol, 7 ⁇ L/10 mL ⁇ -mercaptoethanol, 10 mM Na molybdate, 1 mM dithiothreitol, 5 ⁇ g/1 mL aprotinin, 2 ⁇ g/mL leupeptin, 2 ⁇ g/mL
  • the chimeric receptor expression constructs pcDNA3-hPPAR ⁇ /GAL4, pcDNA3-hPPAR ⁇ /GAL4, pcDNA3-hPPAR ⁇ /GAL4 were prepared by inserting the yeast GAL4 transcription factor DBD adjacent to the ligand binding domains (LBDs) of hPPAR ⁇ , hPPAR ⁇ , hPPAR ⁇ , respectively.
  • the reporter construct, pUAS(5 ⁇ )-tk-luc was generated by inserting 5 copies of the GAL4 response element upstream of the herpes virus minimal thymidine kinase promoter and the luciferase reporter gene.
  • pCMV-lacZ contains the galactosidase Z gene under the regulation of the cytomegalovirus promoter.
  • COS-1 cells were seeded at 12 ⁇ 10 3 cells/well in 96 well cell culture plates in high glucose Dulbecco's modified Eagle medium (DMEM) containing 10% charcoal stripped fetal calf serum (Gemini Bio-Products, Calabasas, Calif.), nonessential amino acids, 100 units/ml Penicillin G and 100 mg/ml Streptomycin sulfate at 37° C. in a humidified atmosphere of 10% CO 2 . After 24 h, transfections were performed with Lipofectamine (GIBCO BRL, Gaithersburg, Md.) according to the instructions of the manufacturer.
  • transfection mixes for each well contained 0.48 ⁇ l of Lipofectamine, 0.00075 ⁇ g of pcDNA3-PPAR/GAL4 expression vector, 0.045 ⁇ g of pUAS(5 ⁇ )-tk-luc reporter vector and 0.0002 ⁇ g of pCMV-lacZ as an internal control for transactivation efficiency.
  • Cells were incubated in the transfection mixture for 5 h at 37° C. in an atmosphere of 10% CO 2 . The cells were then incubated for ⁇ 48 h in fresh high glucose DMEM containing 5% charcoal stripped fetal calf serum, nonessential amino acids, 100 units/ml Penicillin G and 100 mg/ml Streptomycin sulfate ⁇ increasing concentrations of test compound.
  • Agonism is determined by comparison of maximal transactivation activity with a full PPAR agonist, such as rosiglitazone. Generally, if the maximal stimulation of transactivation is less than 50% of the effect observed with a full agonist, then the compound is designated as a partial agonist. If the maximal stimulation of transactivation is greater than 50% of the effect observed with a full agonist, then the compound is designated as a full agonist.
  • the compounds of this invention have EC 50 values in the range of 1 nM to 3000 nM.
  • mice Male db/db mice (10–11 week old C57B1/KFJ, Jackson Labs, Bar Harbor, Me.) were housed 5/cage and allowed ad lib. access to ground Purina rodent chow and water. The animals, and their food, were weighed every 2 days and were dosed daily by gavage with vehicle (0.5% carboxymethylcellulose) ⁇ test compound at the indicated dose. Drug suspensions were prepared daily. Plasma glucose, and triglyceride concentrations were determined from blood obtained by tail bleeds at 3–5 day intervals during the study period.
  • Glucose, and triglyceride, determinations were performed on a Boehringer Mannheim Hitachi 911 automatic analyzer (Boehringer Mannheim, Indianapolis, Ind.) using heparinized plasma diluted 1:6 (v/v) with normal saline. Lean animals were age-matched heterozygous mice maintained in the same manner.
  • R 3 is Phenoxy or Thiophenoxy
  • R 3 is Benzisoxazole
  • R 3 is Benzoyl
  • R 3 is Phenyl
  • Step 1 1-(3-methoxy)phenyl-2-methyl-6-trifluoromethoxyindole (1): 2-Methyl-6-trifluoromethoxyindole (645 mg, 3.0 mmole), 3-bromoanisole (0.456 ml, 3.6 mmole), sodium t-butoxide (404 mg, 4.2 mmole), trisdibenzylidine dipalladium (206 mg, 0.225 mmole) and 2-di-t-butylphosphinobiphenyl (201 mg, 0.675 mmole) were stirred in toluene at 80° C. and monitored by LC (3/1 hexanes/methylene chloride) or reversed phase HPLC until complete. The reaction mixture was then cooled, filtered over celite, and the filtrate evaporated to give a crude isolate, which was purified by silica gel chromatography to give the title compound.
  • Step 2 1-(3-hydroxy)phenyl-2-methyl-6-trifluoromethoxyindole (2): 460 mg (1.43 mmole) of (1) was dissolved in 7 mL of dichloromethane at 0° C. Boron tribromide (1.0 N, 2.86 mL) in dichloromethane was added, the cooling bath was removed and the reaction was stirred at room temperature overnight. The reaction was then quenched with ice for 30 minutes and partitioned. The organic was washed with water and dried over sodium sulfate. After filtering the drying agent, the filtrate was evaporated and the residue chromatographed over silica gel to give the title compound.
  • Step 3 1-(3-hydroxy)phenyl-2-methyl-3-(4-methoxy)benzoyl-6-trifluoromethoxyindole (3): 242 mg (0.788 mmole) of (2) was dissolved in methylene chloride (4 ml) and cooled to ⁇ 20° C. A solution of diethylaluminum chloride in toluene (1.8M, 1.23 ml) was added slowly (over 1–2 minutes) and stirred for 5–15 minutes. Then added a solution of 4-methoxybenzoyl chloride (377 mg, 2.21 mmole) in methylene chloride (1 mL) and allowed to stir overnight while slowly reaching room temperature.
  • Step 4 (2R)-2- ⁇ 3-[3-(4-methoxy)benzoyl-2-methyl-6-(trifluoromethoxy)-1H-indol-1-yl]phenoxy ⁇ propanoic acid ethyl ester (4): 45.9 mg (0.100 mmole) of (3) was dissolved in tetrahydrofuran (0.5 mL) and cooled to 0° C. Triphenylphosphine (34 mg, 0.130 mmole) and (S)-ethyl lactate (14.7 ⁇ L, 0.130 mmole) were then added, followed by diethylazodicarboxylate (20.5 ⁇ L, 0.13 mmole). The reaction was stirred overnight and then directly chromatographed on silica gel to give the title compound.
  • Step 5 (2R)-2- ⁇ 3-[3-(4-methoxybenzoyl-2-methyl-6-(trifluoromethoxy)-1H-indol-1-yl]phenoxy ⁇ propanoic acid (5): 56 mg of (4) was dissolved in ethanol (1 mL) and aqueous sodium hydroxide (1.0 M, 0.200 mL) and stirred until hydrolysis was complete. The reaction was diluted with water, acidified with dilute aqueous HCl and extracted with ethyl acetate. The organic was dried over sodium sulfate, filtered and evaporated to give the title compound.
  • This compound was made using a synthetic method analogous to Example 1 and using readily available reagents and starting materials. Such a synthesis can be readily carried out by a practitioner in the field of synthetic organic chemistry.
  • Step 1 1-(3-methoxyphenyl-2-methyl-6-trifluoromethoxyindole (1): 2-Methyl-6-trifluoromethoxyindole (645 mg, 3.0 mmole), 3-bromoanisole (0.456 ml, 3.6 mmole), sodium t-butoxide (404 mg, 4.2 mmole), trisdibenzylidine dipalladium (206 mg, 0.225 mmole) and 2-di-t-butylphosphinobiphenyl (201 mg, 0.675 mmole) were stirred in toluene at 80° C. and monitored by TLC (3/1 hexanes/methylene chloride) or reversed phase HPLC until complete. The reaction mixture was then cooled, filtered over celite, and the filtrate evaporated to give a crude isolate, which was purified by silica gel chromatography to give the title compound.
  • Step 2 1-(3-hydroxy)phenyl-2-methyl-6-trifluoromethoxyindole (2): 460 mg (1.43 mmole) of (1) was dissolved in 7 mL of dichloromethane at 0° C. Boron tribromide (1.0 N, 2.86 mL) in dichloromethane was added, the cooling bath was removed and the reaction was stirred at room temperature overnight. The reaction was then quenched with ice for 30 minutes and partitioned. The organic was washed with water and dried over sodium sulfate. After filtering the drying agent, the filtrate was evaporated and the residue chromatographed over silica gel to give the title compound.
  • Step 3 1-(3-hydroxy)phenyl-2-methyl-3-(4-methoxy)benzoyl-6-trifluoromethoxyindole (3): 242 mg (0.788 mmole) of (2) was dissolved in methylene chloride (4 ml) and cooled to ⁇ 20° C. A solution of diethylaluminum chloride in toluene (1.8M, 1.23 ml) was added slowly (over 1–2 minutes) and stirred for 5–15 minutes. Then added a solution of 4-methoxybenzoyl chloride (377 mg, 2.21 mmole) in methylene chloride (1 mL) and allowed to stir overnight while slowly reaching room temperature.
  • Step 4 (2R)-2- ⁇ 3-[3-(4-methoxy)benzoyl-2-methyl-6-(trifluoromethoxy)-1H-indol-1-yl]phenoxyl ⁇ butanoic acid t-butyl ester (4): 110 mg (0.25 mmole) of (3) was dissolved in tetrahydrofuran (1.25 mL) and cooled to 0° C.
  • Chiral purity was assessed by chromatographic comparison on a Chiralcel AD column (heptane/isopropanol as eluents) with the opposite enantiomer (prepared as above using t-butyl-(R)-2-hydroxybutyrate in place of t-butyl-(S)-2-hydroxybutyrate).
  • Step 5 (2R)-2- ⁇ 3-[3-(4-methoxy)benzovl-2-methyl-6-(trifluoromethoxy)-1H-indol-1-yl]phenoxy ⁇ butanoic acid (5): 17 mg (0.03 mole) of (4) was dissolved in dichloromethane (1 mL) and trifluoroacetic acid (0.5 mL, large excess) was added. The reaction was stirred until complete (monitored by TLC). Evaporated solvent and trifluoroacetic acid, reconstituted in dichloromethane, washed successively with pH 7.0 phosphate buffer (Fisher Scientific) and sodium chloride solution. The dichloromethane was dried over sodium sulfate, filtered and evaporated. The compound can then be purified by either ODS or silica gel column (0.5% to 1% acetic acid/ethyl acetate/hexanes needed for silica gel purification).
  • Ketone 2 A suspension of chloroacetone (6.00 gr, 65 mmol, the chloroacetone was filtered through basic alumina prior to use), phenol 1 (10.00 gr, 65 mmole) and potassium carbonate (8.96 gr, 65 mmol) was stirred in DMF at room temperature under nitrogen atmosphere for 1 h. After this time the reaction was diluted with ethyl acetate/H 2 O and the layers were separated. The aqueous layer was acidified with 1N HCl and extracted with ethyl acetate (3 ⁇ ).
  • Indole 3 Ketone 2 (1.84 gr, 8.75 mmol) and 4-trifluoromethoxy phenylhydrazine hydrochloride (2.00 gr, 4.76 mmol) were stirred at 100° C. in acetic acid (40 ml, 0.22M) for 1 hour under nitrogen atmosphere to give a 1:2 mixture of 4- and 6-trifluoromethoxy indoles (desired 6-substituted indole is slightly less polar by TLC). The reaction was cooled to room temperature, the acetic acid was removed under reduced pressure and the residue was diluted with ethyl acetate and washed with water (1 ⁇ ) and brine (1 ⁇ ).
  • 3-H indole 4 A solution of indole 3 (0.29 gr, 0.78 mmol) and thiosalicylic acid (0.12 gr, 0.78 mmol) in trifluoroacetic acid (3 mL, 0.26M) was heated to 50° C. under nitrogen atmosphere for 2 hr. After this time the reaction was cooled to room temperature, diluted with ethyl acetate and washed with 1N NaOH (2 ⁇ ), and brine (1 ⁇ ).
  • 3-Acylindole 5 Zinc chloride (0.23 gr, 1.66 mmol) and ethyl magnesium bromide (0.29 ml of a 3M solution in ether, 0.87 mmol) were added to a solution of indole 4 (0.16 gr, 0.74 mmol) in CH 2 Cl 2 . The resulting mixture was stirred at room temperature under a nitrogen atmosphere for 1 hr. 4-Chlorobenzoyl chloride (0.21 gr, 1.18 mmol) was then added and stirring was continued for 1 hr. Finally, aluminum chloride (0.053 gr, 0.39 mmol) was added and the reaction mixture was stirred for 3 hr.
  • N-benzyl indole 6 Sodium hydride (14 mg, 0.35 mmol, 60% dispersion in mineral oil) was added to a solution of indole 5 (111 mg, 0.32 mmol) in DMF (3.0 ml, 0.1M). The resulting mixture was stirred at room temperature under nitrogen for 10 min, then bromide 10 (110 mg, 0.35 mmol) was added. Stirring was continued at room temperature for 2 hr. The reaction mixture was then diluted with ethyl acetate, washed with water (2 ⁇ ) and brine (1 ⁇ ), dried with sodium sulfate, filtered, and evaporated to give a yellow oil after column chromatography (4:1 hexanes/ethyl acetate).
  • Acid 7 N-Benzyl indole 6 (121 mg, 0.206 mmol) and aqueous sodium hydroxide (0.50 mL, 5.0M) were stirred in tetrahydrofuran, methanol, and water (2.5 ml, 3:1:1) at room temperature for 7 hr. After this time, the reaction concentrated by rotary evaporation and purified by reverse phase HPLC to give acid 7 as a white solid.
  • Phenol 9 3-Methoxybenzyl bromide (3.0 gr, 15 mmol) was dissolved in CH 2 Cl 2 and cooled to 0° C. A 1M solution of boron tribromide in CH 2 Cl 2 (17.9 ml, 17.9 mmol) was then added dropwise. After 30 min, the ice bath was removed and stirring was continued for an additional 30 min. The rxn was then quenched with ice and diluted with CH2Cl 2 , H2O. The layers were separated and the organic layer was washed with H2O (2 ⁇ ) and brine (1 ⁇ ), dried with sodium sulfate, filtered, and evaporated to give phenol 9 as a white solid.
  • enantiomeric purities of the product For analysis of enantiomeric purities of the product: a 10 ⁇ l sample solution of approximately 1.0 mg/ml in concentration was injected onto a Chiracel OD analytical column (4.6 ⁇ 250 mm, 10 micron). The column was then eluted with an isocratic solvent system consisting of 5% isopropanol in heptane at a flow rate of 0.5 ml/min. Peaks were recorded at the wavelength of 254 ⁇ m with an UV detector. Under these conditions, the retention time of the S enantiomer is approximately 10 minutes while the retention time of the R enantiomer is about 20 minutes.
  • Enantiomeric excess (ee %) are calculated as area under curve of the S enantiomer subtract area under curve of the R enantiomer and divided by the sum of the two areas.
  • the Chiracel OD Semi-Prep column (20 ⁇ 250 mm, 10 micron) was used. A 1.8 ml sample solution of approximately 40 mg/ml in concentration was injected. The column was then eluted with an isocratic solvent system consisting of 5% isopropanol in heptane at a flow rate of 9.0 ml/min. Peaks detected above 0.5 mV threshold at the wavelength of 254 ⁇ m were collected with a Gilson fraction collector.
  • ketone (12.89 g) and 3-trifluoromethoxyphenyl hydrazine (12.22 g) were dissolved in benzene (50 mL).
  • the reaction mixture was heated at 60° C. for 45 min, cooled to room temperature, dried over anhydrous Na 2 SO 4 , filtered, and concentrated in vacuo to give the phenylhydrazone (23 g), which was used immediately without further purification.
  • Example 32 A synthetic method is shown below in Example 32 for a compound in which R 3 is phenyl. This and other compounds in which R 3 is phenyl are shown in Table 4. The other compounds in Table 4 were synthesized using the methods and strategies described herein and readily available materials. Such synthetic methods and materials are readily apparent to a practitioner in the field of synthetic chemistry.
  • R 3 is Phenoxy or Thiophenoxy MOLSTRUCTURE PARENT WEIGHT Mass Spec Retention Time 1 533.936 M + H 4.45 2 431.558 432 4.15 3 451.976 452 4.14 4 451.976 452 4.21 5 547.963 M + H 4.51 6 533.936 M + H 4.45 7 535.974 536 4.7 8 529.518 M + H 4.18 9 529.518 M + H 4.21 10 519.909 M + H 4.49 11 479.965 M + H 4.18 12 479.965 M + H 4.21 13 547.963 4.51 548 (M + 1) 14 492.02 15 492.02 16 499.491 500 (M + 1) 3.8 min 17 499.491 500 (M + 1) 3.8 min 18 499.491 500 (M + 1) 3.99 min 19 499.491 500 (M + 1) 4.06 min 20 519.909 M + H 4.49 21 533.936 M + H 4.32 22 533.936 M + H 4.32 23
  • R 3 is Phenoxy or Thiophenoxy 1 (2R)-2-(3- ⁇ [3-(4-chlorophenoxy)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)butanoic acid 2 (2R)-2-(3- ⁇ [2-methyl-3-(phenylthio)-1H-indol-1-yl]methyl ⁇ phenoxy)butanoic acid 3 (2S)-2-(2-chloro-5- ⁇ [2-methyl-3-(phenylthio)-1H-indol-1-yl]methyl ⁇ phenoxy)propanoic acid 4 (2R)-2-(4-chloro-3- ⁇ [2-methyl-3-(phenylthio)-1H-indol-1-yl]methyl ⁇ phenoxy)propanoic acid 5 2-(3- ⁇ [3-(4-chlorophenoxy)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]
  • R 3 is Benzlsoxazole MOLSTRUCTURE PARENT WEIGHT Mass Spec Retention Time 1 540.501 541.1 (M + H) 3.91 2 544.919 545.3 (M + H) 4.41 3 544.919 545.3 (M + H) 4.41 4 540.501 541.1 (M + H) 4.09 5 540.501 541.1 (M + H) 4.06 6 540.501 541.1 (M + H) 4.11 7 574.946 575.4 (M + H) 4.28 8 574.946 575.1 (M + H) 4.34 9 574.946 575.4 (M + H) 4.27 10 526.473 11 540.501 12 526.473 13 540.501 14 554.528 555.2 (M + H) 3.79 15 554.528 555.2 (M + H) 3.96 16 568.555 569.4 (M + H) 4.36 17 579.364 579.1 (M + H) 4.49 18 579.364 579.1 (M + H) 4.48 19 5
  • R 3 is Benzisoxazole 1 (2S)-2-(3- ⁇ [3-(6-methoxy-1,2-benzisoxazol-3-yl)-2-methyl-6-(trifluoromethoxy)-1H-indol- 1-yl]methyl ⁇ phenoxy)propanoic acid 2 (2S)-2-(3- ⁇ [3-(6-chloro-1,2-benzisoxazol-3-yl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 3 (2R)-2-(3- ⁇ [3-(6-chloro-1,2-benzisoxazol-3-yl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 4 (2R)-2-(3- ⁇ [3-(6-methoxy-1,2-benzisoxazol-3-yl)-2-methyl-6-
  • R 3 is Benzoyl MOLSTRUCTURE PARENT WEIGHT Mass Spec Retention Time 1 443.504 444.1 (M + H) 3.44 min 2 527.502 528.1 (M + H) 3.87 min 3 531.92 532.0 (M + H) 4.11 min 4 527.502 528.1 3.75 min 5 527.502 528.1 (M + H) 3.77 min 6 513.475 514.0 (M + 1) 3.88 min 7 541.529 542.0 (M + H) 3.91 min 8 527.502 528.2 (M + 1) 3.96 min 9 511.502 512 (M + 1) 3.95 10 555.556 11 609.527 12 531.92 532.0 (M + 1) 4.33 min 13 532.908 533.1 (M + 1) 3.95 min 14 542.516 543.1 (M + 1) 4.12 min 15 497.475 16 595.5 17 532.908 533.1 (M + 1) 3.70 min 18 512.49 513.2 (M + 1) 3.23 mon 19 548.523 549.2 (M + 1) 4.02 min 20 599.919 M
  • R 3 is Benzoyl 1 (2S)-2-(3- ⁇ [3-(4-methoxybenzoyl)-2-methyl-1H-indol-1-yl]methyl ⁇ phenoxy)propanoic acid 2 (2S)-2-(3- ⁇ [3-(4-methoxybenzoyl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 3 (2S)-2-(3- ⁇ [3-(4-chlorobenzoyl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 4 (2S)-2-(3- ⁇ [3-(4-methoxybenzoyl)-2-methyl-5-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 5 (2R)-2-(3- ⁇ [3-(4-me
  • R 3 is Phenyl MOLSTRUCTURE PARENT WEIGHT Mass Spec Retention Time 1 499.491 500 (M + 1) 4.22 2 499.491 500 (M + 1) 4.22 3 513.518 514 (M + 1) 4.28 4 513.518 514 (M + 1) 4.29 5 499.491 500 (M + 1) 4.14 6 499.491 500 (M + 1) 4.14 7 513.518 514 (M + 1) 4.19 8 513.518 514 (M + 1) 4.19 9 527.545 528 (M + 1) 4.35 10 527.545 528 (M + 1) 4.36 11 567.49 568 (M + 1) 4.07 12 567.49 568 (M + 1) 4.07 13 601.935 602 (M + 1) 4.21 14 501.937 502 (M + 1) 4.15 15 501.937 502 (M + 1) 4 16 489.883 M + H 4.26 17 489.883 M + H 4.26 18 501.937 502 (M + 1) 4.15 19 517.937 518 (M
  • R 3 is Phenyl 1 (2S)-2-(3- ⁇ [3-(4-methoxyphenyl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 2 (2R)-2-(3- ⁇ [3-(4-methoxyphenyl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)propanoic acid 3 2-(3- ⁇ [3-(4-methoxyphenyl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)butanoic acid 4 2-(3- ⁇ [3-(4-methoxyphenyl)-2-methyl-6-(trifluoromethoxy)-1H-indol-1- yl]methyl ⁇ phenoxy)butanoic acid 5 (2S)-2-(3- ⁇ [3- ⁇ [3-(4
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